There have been numerous attempts to improve on Pac-Man over the years by both Namco and third parties.
One such attempt by the former was Pac-Mania, a game which transplanted Pac-Man’s simple single-screen maze-based gameplay into a scrolling, oblique-perspective affair with jumping, power-ups and visually themed worlds.
Opinions vary as to whether it’s actually an improvement on Pac-Man or not, but one thing is certain: Grandslam’s port to Atari ST was very solid indeed, and one of the few Atari ST games I actually remember buying for myself back when I was a kid!